Dragon's Flame

You unleash a gout of fire at a creature or object in front of you. Make a melee spell attack against the target. On a hit, the target takes 1d8 fire damage plus 1d4 force damage. A flammable object hit by this spell ignites if it isn't being worn or carried

This spell's damage increases by 1d4  when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).